<template>
  <a-layout>
    <a-layout-sider width="200" style="background: #fff">
      <a-menu
          mode="inline"
          :style="{ height: '100%', borderRight: 0 }"
          @click="handleClick"
      >
        <a-menu-item key="welcome">
          <MailOutlined/>
          <span>欢迎</span>
        </a-menu-item>
        <a-sub-menu v-for="item in level1" :key="item.id">
          <template v-slot:title>
            <span><user-outlined />{{item.name}}</span>
          </template>
          <a-menu-item v-for="child in item.children" :key="child.id">
            <MailOutlined /><span>{{child.name}}</span>
          </a-menu-item>
        </a-sub-menu>
      </a-menu>
    </a-layout-sider>
    <a-layout-content
        :style="{ background: '#fff', padding: '24px', margin: 0, minHeight: '280px' }"
    >
      <div class="welcome" v-show="isShowWelcome">
        <h1>欢迎使用</h1>
      </div>
      <a-list v-show="!isShowWelcome" item-layout="vertical" size="large" :grid="{gutter: 20,column: 3}" :data-source="ebooks">
        <template #renderItem="{ item }">
          <a-list-item key="item.name">
            <template #actions>
              <span v-for="{ type, text } in actions" :key="type">
                <component v-bind:is="type" style="margin-right: 8px" />
                {{ text }}
              </span>
            </template>
            <a-list-item-meta :description="item.description">
              <template #title>
                <a :href="item.href">{{ item.name }}</a>
              </template>
              <template #avatar><a-avatar :src="item.cover" /></template>
            </a-list-item-meta>
          </a-list-item>
        </template>
      </a-list>
    </a-layout-content>
  </a-layout>
</template>

<script lang="ts">
import { defineComponent, onMounted, ref, reactive,toRef } from 'vue';
import axios from 'axios';
import {message} from 'ant-design-vue';
import {Tool} from '@/util/tool';



export default defineComponent({
  name: 'Home',
  setup(){
    //ref()将一个数据变成响应式（js数据修改，界面也会刷新）
    const ebooks = ref();

    const level1 =  ref();
    let categorys: any;
    /**
     * 查询所有分类
     **/
    const handleQueryCategory = () => {
      axios.get("/category/all").then((response) => {
        const data = response.data;
        if (data.success) {
          categorys = data.content;
          console.log("原始数组：", categorys);

          level1.value = [];
          level1.value = Tool.array2Tree(categorys,0);
          console.log("树形结构：", level1.value);
        } else {
          message.error(data.message);
        }
      });
    };

    const isShowWelcome = ref(true);
    let categoryId2 = 0;

    const handleQueryEbook = () =>{
      axios.get("/ebook/list",{
        params: {
          page: 1,
          size: 1000,
          categoryId2:categoryId2
        }
      }).then((response) => {
        const data = response.data;
        ebooks.value = data.content.list;
        // ebooks1.books = data.content.list;
      });
    }

    const handleClick = (value: any) => {
      if (value.key === 'welcome'){
        isShowWelcome.value=true;
      }else{
        categoryId2 = value.key;
        isShowWelcome.value=false;
        handleQueryEbook();
      }
      console.log("menu click",value)
    };


    //reactive里面一般放一个对象,这里是json对象，books用来存储数组数据
    const ebooks1 = reactive({books:[]});

    const pagination = {
      onChange: (page: number) => {
        console.log(page);
      },
      pageSize: 3,
    };
    const actions: Record<string, string>[] = [
      { type: 'StarOutlined', text: '156' },
      { type: 'LikeOutlined', text: '156' },
      { type: 'MessageOutlined', text: '2' },
    ];

    //初始化
    onMounted(() => {
      handleQueryCategory();
      handleQueryEbook();
    });
    return{
      ebooks,
      ebooks2: toRef(ebooks1,"books"),
      // listData,
      pagination,
      actions,
      handleClick,
      level1,
      isShowWelcome
    }
  }
});
</script>

<!--scoped只在当前页面生效-->
<style scoped>
  .ant-avatar{
    width: 50px;
    height: 50px;
    line-height: 50px;
    border-radius: 8%;
    margin: 5px 0;
  }
</style>
